I worked in midtown Manhattan from 1965 to 1988. I often spent my lunch hours visiting sudio shops including Harveys on 45th street. I purchased small items that I could carry home from the 45th st store--eg phono cartridges. When it came to a pair of speakers-DCM Time Windows, I made the purchase in a Harvey store in the suburbs near my home.
I have fond memories of visiting Harveys--I enjoyed just looking at their window displays.
It is sad to hear of their closing. I do not know if they tried to focus on surround sound and custom installations--seems like that would have been an opportune area in Manhattan